Demountable tire-rim.



A. DOW. I DEMOUNTABLE TIRE RIM. APPLICATION FILED DEC. 30. 1908:

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Patented May 18 3513 arrow M21 PW 9 J21??? A. DOW. DEMOUNTABLE TIRE RIM.

APPLICATION FILED DEC. 30. 1908.

922,402. Patented May 18, 1909.

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Giro (M11134 MW 7 (fix-7* A. DOW.

DBMOUNTABLE TIRE RIM.

APPLICATION FILED DEC. 30. 1908.

Patented May 18, 1909.

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07/4421 y l/ E A. DOW. DEMOUNTABLB TIRE RIM.

APPLICATION FILED DBO. 30v 1908.

Patented May 18, 1909.

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DEMOUNTABLE TIRE RIM. APPLICATION FILED DEG.30,190B.

Patented May 18, 1909.

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A. DOW.

- DEMOUNTABLE TIRE RIM.

APPLICATION FILED DEC. 30. 1908.

922,402., Patented May 18, 1909.

6 SHEETS-SHEET 6.

' citizen of the United UNiTED STATES PATENT ()FFIQE.

-ALEXANDER DOW, OF NEW YORK, i\'. 1., .ibbltiNOlt 'lU DOW RIM t'OMlC-DJ 1', A CORPORATION Ul .YEW

YORK.

'DEMOUNTAIB LE TIRERIM Specification of Letters Patent.

Patented May is, 1909.

T6 all whom it may concern .Be it known that I, rrLEXANDER Dow, :1.

States of America, residing at New York city, in the county and State of New York, have invented certain oi the wheels. of which the following is a i i will more fully hereinafter appear in con- .My invention relates to an improvement in demountable the rims for automobiles y wheel with the demonntable rim and tire new and useful improvements in Demountable Tire-Rims, specification.

and the like.

The object of the invention is to construct f the demountable tire and wheel rims in such fashion that upon proper relative movement of the two, the same are securely locked against both lateral and circumferential displacements without the use of bolts, clamps or other additional I-Ieretot'ore the demonntable tire rim or wheel rim or both. have ordinarily been provided with flanges adapted to be engaged by a, lateral movement of the tire rim over the Wheel rim, after which certain bolts or clamps have been utilized to prevent lateral and other displacement of the tire rim. These movable bolts or clamps have necessarily been individual devices disposed at intervals around the wheel, each requiring separate attention, and thereby involving a loss of much valuable time removing the tire. Furthermore, such locking devices or clamps being generally held in position by screws or bolts were not necessarily securely held, and could, therefore, be-

come loosened in consequence of the vibration of the wheels of the vehicle when in use. In my invention on the other hand all the locking devices are in effect integral with the deniountable tire and telly rims and are brought into interlocking engagement simultaneously by a single movement or the lure rim on the telly.

My invent-ion also comprises means whereby upon a proper relative movement of the tire and wheel rims to interlocking position, the final locking is automatic. The interlocking devices of my invention consist of cooperating wedge shaped surfaces on both j elements locking the same and preventing both lateral and circumferential displacement.

My invention also comprises means for moving the rims with their wedges over each l other with great force to bring the parts to locking position. Once in proper position, a i

locking devices.

in placing and single automatic spring bolt operates to pre- These and other objects of the invention nection with the accompanying drawings.

'igure 1 1s a view in side elevation ot the assembled thereon. Fig. 2 is a ,view on the line of Fig. 1. Fig. 3 is a view in side elevation 01 the demountable rim and tire thereon showing theJockin devices carried by the demonntablc rim. lig. 1 is a view in side elevation of the wheel showing the locking devices carried by the rim on the telly thereof. Fig. 5 is a detail view partly in broken cross-section and partly in elevation, showing the demountablc rim in locked posi- (ion on the telly and showing also a device for moving the rim into'and out of locking position. Fig. (5 is a detail view in perspective showing the locking wedges of the demountable rim and wheel in locked position. Fig. 7 is a detail view in cross -section through the demountable rim and wheel telly on the line T-T of Fig. Fig. 8 is a view in cross-section on the line of Fig. 5. Fig. 9 is a view similar to Fig. 7 in cross-section through a modified form of demonntablc rim and wheel t'clly in locked position- Fig. 10 is a detail perspective view showing the locking wedges on the wheel telly rim of Fig. J. Fig. ll is a. view in enlarged detail taken in cross-section through the devices shown in Figs. 1 and 2 for locking the demountable rim in position on the wheel. Fig. 12 is a detail top plan view of the locking device shown in Fig. 11, the demountable rim being removed. Fig. 13 is a bottom plan view of the section of the demountable rim shown in Fig. 11. Fig. 14 is a detail view in cross sectional elevation of the cup or casing carrying the locking pin and spring shown in-Fig. 11. Fig. 15, is a bottom plan view of the device shown in Fig. 1 1. Fig. 1G is a locking pin shown in Fig. 11. Fig. 17 is ,a bottom plan view of the locking pin and finger lever for operating the same. Fig. 18 is an enlarged detail view in cross-sectional elevation of a modified form of device for moving the demonntablc rim into and out of locking position "on the wheel felly. Fig. 19 is a view in cross-section on the line 19-19 of Fig.

yet another modification of the invention.

Referring to the drawings, the wheel felly 1 is shown provided with a metal rim 2. Spaced equidistantly around the periphery of the rim 2 and preferably integral therewith are wedges 3. These wedges are tapered in two directions- They taper upward from the base of a flange 4 at the inner side of the rim 2 and outward to the outer face of the rim and felly. They also ta er from a point 5 (see Fig. 5) at the rig thand end of the wedge upward on a curve which is slightly spiral to apoint 6 at the left-hand end of the wedge. The double wedge shape is best shown in Fig. 6.

The tire 7 (see Figs. 1, 2 and 3) carries a metal rim 8. Spaced equidistantly around the rim 8' and preferably integral therewith area series of wed es or looking devices 9. The wedges 9 like t e wedges 3 on thefelly have adouble taper, the tapers of the Wed 9, as shown in Figs. 5, 6 and 7 being exactly converse to the tapers of the wedge 3. The distances between successive wedges 3 on the wheel are greater than the length of the wedges 9 so that the latter may be pushed over the felly rim 2 between the wedges 3 when the tire is to be placed upon the wheel or be removed therefrom.

having'been placed on the wheel by passing the wedges 9 laterally over the rim 2 between the wedges 3 of the latter, the wheel and tire are then securely locked together by a relative circumferential movement of the same.

. By suitable means presently to be described,

the'long tapered surface'ofv the wedge 9 of the tire between the points 5 and '6 (see Fig. 5) is forced over the corresponding surface of the wedge 3 until the ends'5 and 6 of the two wedges register as shown in Figs. 5 and 6, at which time the engagement of the two surfaces prevents relative movement of the two parts in that direction. During the above-movement the laterally tapered surfaces of the two. wedges (see Fig. 7) have by engagement one with the other caused the shoulder 10 on the wedge 9 to be forced against the inner face of the flange 4 of the wedge 3. The flange 4 then prevents the demountable rim from passin backward off the wheel, while the upwar taper of the wedge 3 prevents the demountable rim from being moved outward laterally and off the wheel. The demountable rim is then looked against lateral movement in both directions and against circumferential movement in one direction, andwit only remains to lock'it against circumferential movement in the direction of the arrow of Flg. 5 to secure it absolutely against displacement. The deinner surface of the demountable tire rim is a counter-sink or hole 12 of the same size and shape as the hole in the member 11, 'which is adapted to register with the hole in the member 11 when the parts are in the locked position shown in Figs. 1 and 5. Carried within the opening in the member 11 on a pin 13 is a bolt 14. The pin 13 is carried in a hollow casing or member 15 which aroje'cts from the'inner periphery of the felly tlierethrough into the opening in the member 11 and which is secured to the felly and to the member 11 by means of bolts 16 as shown in Fig. 11. A spiral spring 17 embracing the pin 13 and bearing at one end against an inner shoulder 18 in the member 15 and at the other end against the bolt 14 tends normally to throw the'bolt 14 outward into the positionshown in Fig. 11. To op- ,erate the bolt 14, there is hinged thereto a a the end of the member 15, which engage the The demountable rim with the tire thereon arms of the fork 21 carrying the finger lever. The bolt is withdrawn against the action of the spring 13 by turning the finger lever down from the position shown in Fig. 11 in the direction of the arrow around the pin 22 as an axis. In order that the .bolt l3 may be withdrawn by this movement of the lever 19, the arms of the fork 21 are cam-shaped as shown at 23, the surface 24 being nearer the pin 22 than the surface 25. hen the lever 19 is at right-angles to the position shown in Fig. 11, the surfaces 25 rest upon the end of the member 15 and the bolt is withdrawn from the hole 12 in the demountable rim 8. The pressure of the spring 18 holds the lever 19 firmly in either. of its two positions. The bolt 14 is so shaped and designed that it is capable of sustaining the driving pressure exerted upon it by the demountable tire rim 8. It will be noted that the wedges are so shaped .thatthe pressure exerted by the driving action of the wheels demountable tire rim diflicult, and, furthere handle 39.

conic slightly displaced upon the wheel in either direction.

In Figs. 5 and 8, and 18 and 19, are shown two different forms of devices for moving the demountable tire rim into position upon the wheel felly. The device for effecting this movement as shown in Figs. 5 and 8, is; a two-armed or hell crank lever 26, carrying at the elbow thereof a bearing pin .27. Mounted at a suitable point in the wheel felly is a. hollow bushing or hearing 28 into which the bearing pin 27 loosely fits so as to be readily inserted or removed. In the edge of the demountable tire rim, as at 29 (see Figs. 5 and 8) is a slot or groove adapted to latter over the wedge 3 of the former to the; position shown in Fig. 5. The lever 26 is then removed from the wheel. In removing the demountable tire rim the lever 26 is then placed in the wheel and the arm 31 forced up. The movement of the lever need not be great, as ordinarily all but a short part of the movement of the parts may be effected by hand.

In Figs. 18 and 19, a somewhat different form of device for moving the demountable tire rim into position is shown. In the structure shown in this figure, the'demountable tire rim 8 carries a depending flange 32 in the lower edge of which a series of teeth are cut to form a segment of an internal gear or rack. To the 'side of the felly of the. wheel, a plate 34 is attached as'by means of bolts The plate 34: has a hole '36 at its center. which serves as a bearing for the end- ?)7 of a shaft 38. carrying at. its outer end the the shaft 38 carries a pinion 40. which when the end 37 oi. the shaft is inserted in the hole 36 of the plate. meshes with the rack or gear 32. In operation the demountable tire rim having been forced laterally on to the wheel and having been moved by hand as-far as possible circumferentially. the shaft38 is inserted in its bearing with the teeth of the pinion 4O engaging the teeth of the rack 32, and the handle 39 is then turned as far as necessary to force the wedge 9 over the wedge 3. In ren'ioving the demountable tire rim, the operation is just the reverse. The locking bolt 14 is automatic in its action, snapping into the recess 12 in the demountable tire rim as soon as that recess registers with the bolt.

In Fi s. 9 and 10, I have shown a modified form 0 wed e or locking device. Here, as in Figs. 5 and 6, there is a double wedge ac- .\t. its inner end near the plate 31 j tion. The wedges 11 carried by the wheel. taper from a point 42 at one end thereof outward radially to the point 13 at the other end. and the wedges 44 on the demountable tire rim have a taper converse to the taper on the wedges 11. In addition to the wedge action denoted by the taper between the lines -12 and. 13 (see Fig. 9) there is another wedge action. In this modification instead of a flange 1 at one side of the wheel folly and the lateral taper therefrom. as in Fig. 7.

there are two flanges or sloping snrfaees -25,

one on either side of the telly rim as shown in Fig. 10. The distance between these members 45 atthe points 16 thereof is greater than the distance between the same at the points 17 thereof. The demountable tire rim (see Fig. \9) is tapered laterally at either side -18 thereof conversely to the taper of the elements 45-1111 the wheel rim. -As in the case of the structure shown in Figs. 5 and 6. the demonntable tire rimis first forced laterally on the wheel rim and the wedges then brought into engagement by a relative circumferential movement. During this movement, the bottom face of the wedge of the demountable tire rim is brought into engagement with the central face of the wedge of the wheel rim, and the side tapers of the two wedges are likewise brought into contact so that lateral displacement as well as forward movement are finally prevented when the locking bolt snaps into position.

In the forms of the apparatus heretofore described, the wedges have been shown integral with the tire and wheel rims. Instead, however, of having the wedges thus integral with the rims, they may be made separable therefrom, and in Figs. 20 and 21, I have shown the wedges so made. In Fig. 20, the felly rim 2 is shown as provided with the usual inner flange 4L. Positioned centrally of the felly rim are a series of recesses or slots 57 corresponding in number to the number of the wedges or one continuous slot. The wedges 3 of the wheel rim which are of the style shown in Fig. 5, are each provided on their under surface with a depending pro jection 58 adapted to fit into the recess 57 in the wheel rim and to beheld thereby against lateral displacement during the locking movements of the parts. The demountable tire rim 8 is provided with a de- Fig. 21, the Wheelrim inaddition to the flange eon the inner side is provided with a flange 61 on the outer side thereof, between which flanges the 'wedges3 are securely held. The demountable tire rim 28 is constructed as in Fig. 20, except that the flange 66 on the outside face thereof projects but a short distance below the outer surface of wedge 9.

What I claim is:

1. In combination, a fixed. felly rim and a demountable rim carrying the tire, wedges on the fixed rim and on the demountable rim adapted to be broughtinto engagement with each other by a relative circumferential movement .of the rims, the .opposing surface of the Wedges having a'general incline along the circumference of the wheel from a longer to a shorter wheel radius, and having also an incline transverse to the circumference and means for locking the demountable rim to the fixed rim when the opposing Wedges are inproper engagement.

' 2. In combination, a fixed felly rim and a demountable rim carrying the tire, wedges, 'on the fixed rim and on the demountable rim adapted to be brought into engagement with each other by a relative circumferential movement of the rims, the opposing sur. faces of the wedges having a general incline along the circumference of the wheel from a longer to a shorter-wheel radius, and having alsoan incline transverse .to the circumfei ence' from' a longerto a shorter wheel radius, means for locking the demountable rim to the fixed rim when the opposing wedges are n proper engagement, and means whereby a leverage may be exerted 011 the two rims-t0 move one circumferentially over the other."

' 3,. In combination, a fixed felly rim and a demountable-rim carrying the tire, wedges on the fixed rim and on the demountable rimadapted to be brought into engagement with each other by a relative circumferential movement of the rims, the opposing surfaces of the wed 'es having a general incline along thecircumerence of the wheel from a longer to a'shorter Wheel radius, and having also an incline transverse to the circumference,

means for locking the demountable rim to.

the fixed rim when the opposing wedges are in proper engagement, and a rack or segmental gear carried'by one of the rims engagin a pinion carried by the other rim, whereby upon rotation of the pinion one rim is moved circumferentially over the other.

4.. In combination, a fixed felly rim and a demountable rim carrying the tire, wedges opthe fixed rim and onthe demountable rim "adapted to be brought into engagegnent with each other by a relative circumferential movement of the rims, the opposing surfaces of the wedges having a ge1i-.

eral incline along the circumference of the wheel -from a longer to a shorter-wheel radius, and having also an incline transverse to the circumference from a longer to a shorter wheel radius and means acting automatically to lock the demonntable rim to the fixed rim when the opposing wedges-are in proper engagement.

. 5. In combination, a fixed felly rimand a demountable rim carrying a tire, a vertical flange on the periphery of the fixed rim near the inside face thereof, wedges on the fixed rim and on the. demountable rim adapted to'be brought into "engagement with 6. In combination, the fixed felly rim and a demountable rim carrying a tire, wedges on the fixed rim and on the demountable rim adapted to be brought into engagement with each other by a relative circumferential movement of the two rims,;the1 opposing faces of the two wedges being approximately of spiral contour when viewed from the side of the wheel, and beingalso later ally inclined from a longer wheel radius toward one face ofthe wheel to a shorter wheel radius to'wardthe other face of the wheel.

7 In combination, a fixed felly rim and a demountable rim carrying a tire, wedges on the fixed rim and on the demountable rim adapted to be brought into engagementwith each other by relative circumferential movementof' the two rims, a rack carried by one of the rims and a removable pin on forming.

part of a tool for engaging the rack to move the rack with the demountable rim over the fixed rim when the pinionis rotated.

Signed by me at New York city; county and State of New Yorlnthis 29th day of December, 1908.

ALEXANDER DOW.

\Vitnesses 7 WiLLIAM l-L I'IEAGERTY, Ormnrns I). Enwanns.

each other by arelative circumferential 

